<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/jquery-3.3.1.min.js"></script>
    <script src="js/bootstrap.min.js"></script>
    <link rel="stylesheet" type="text/css" href="css/bootstrap.min.css">
</head>
<body>
<h1 style="text-align: center;margin-top: 100px">你好</h1>
</body>
</html>